Glossary, Acronyms, and Abbreviations - IIUSA

D - data
D - depth
D
D - Channel - Data Channel or Delta Channel (depending on who
you ask). The channel which handles ISDN network related data
between the user's equipment and the Telco switch. Used to carry
data to set up calls and receive calls. Some Telco's also allow
users to use the D channel to access the packet data network,
with appropriate terminal equipment.
D/A - digital-to-analog
D/C - downconverter
D/L - downlink
D4 - See Superframe. See also Line Format.
D4 - Framing - The framing format used on most existing 1.544
Mbps facilities. Refers to a particular pattern (100011011100) that
appears one bit at a time in the 193rd bit position of the
Superframe. Each D4 Superframe has 12 main frames at 192 bits
in length. This pattern accounts for 8 Kb out of the 1.544 Mb
leaving only 1.536 Mb for information.
DA - data administrator
DA - Department of the Army
DAA - data access arrangement
DAA - Designated Approval Authority
DAAS - defense automatic addressing system
DAB - digital audio broadcasting
DAC - data acquisition and control
DAC - digital to analog converter
DAC - discretionary access control
DACB - data adapter control block
DACES - defense automated cost engineering system
DACM - data adapter control mode
DACS - Data and Analysis Center for Software
DACS - (Digital Access Cross-Connect System) - An AT&T service
allowing a full T1 facility, or one of its channels to be crossconnected
to another T1 facility.
DACT - data automated communications terminal (USMC)
DADEMS - DA data element management system
DAE - Defense Acquisition Executive
DAG - directed access groups
DAIM - dual ASAS interface module
DAL - disk access lockout
DAMA - demand assignment (assigned) multiple access
DAME - Division Airspace Management Element
DAMMS - Department of the Army movement management system
DAMP - DGM antenna mast program
DAMPS - digital advanced mobile phone system
DAP - data analysis plan
DAP - design analysis phase
DAP-NAD - deterministic adaptable priority network access delay
(protocol)
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DAP - Directory Access Protocol
DAR - defense acquisition radar
DAR - defense acquisition regulation
DAR - distortion adaptive receiver
DARMS - data automation resource management system
DARO - Defense Airborne Reconnaissance Office
DARP - Defense Airborne Reconnaissance Program
DARS - digital audio radio service
DART - dynamic analysis replenishing tool
DART - dynamic analytical replanning tool
DAS - data acquisition subsystem
DAS - direct access subscriber
DAS - direct access service
DASA - DSCS automatic spectrum analyzer
DASC - direct air support center
DASD - direct access storage device
DASH - deployable automation support host (Army)
DASP - data administration strategic plan (DOD)
DASS - digital acoustic sensor simulator
DAT - digital audio tape
DAT - data analysis tool
DAT - data
Data - Mode - A DDS circuit is in data mode when the circuit's C bit =
1 (the data bits contain customer data).
DATINT - data intelligence
DATU - data adapter termination unit
DAU - data acquisition unit
DAVIC - Digital Audio-Visual Council
DAWN - defense attache worldwide network
DAWS - defense automated warning system
DB - data base
DB - data buffer
dB - (Decibel) - The standard unit used to express the relative
strength of two signals. When referring to a single signal
measured at two places in a transmission system, it expresses
either a gain or a loss in power between the input and output
devices.
DBA - data base administration
dBA - decibels absolute
DBC - digital battlefield communications
DBCS - double-byte character set
DBD - display bypass and duplication
DBDD - database design document
DBDR - data base design review
DBG - data base generation
dBi - decibels above isotropic reference
DBK - dominant battlefield knowledge
DBL - double
DBM - Data Base Manager